E1968A Datasheet, PDF (17/22 Pages) Keysight Technologies – GSM/GPRS/EGPRS Test Application

17 | Keysight | E1968A GSM/GPRS/EGPRS Test Application - Technical Overview
Phase and amplitude versus time (PAvT)
measurement
Optional PAvT measurement, requires separate license, orderable
as part number E1968A-410.
All specifications for the PAvT measurement are valid between
+20 and +55 °C.
Types of signals
measured
CW only – discrete amplitude step waveform or
continuous ramp waveform
Waveform type
Discrete or continuous
Trigger sources
RF rise, immediate, external
Trigger delay
Settable between 0 to 10 ms
Trigger threshold
Settable between 0 to 30 dB
Measurement timeout Settable between 0.1 to 999.9 s
Continuous
measurement count
Settable between 1 to 5000
Continuous
measurement delay
Settable between 0 to 500 ms
Discrete step width
Settable between 0.1 to 400 ms
Discrete step count
Settable between 1 to 512
Discrete step center Settable between 0.05 to 399.95 ms
Concurrency capabilities PAvT measurements cannot be made
concurrently with any other measurements
Fast device tune (FDT) measurement
Optional FDT measurement requires separate license, orderable
as part number E1999A-202.
All specifications for the FDT measurement are valid for the
frequency ranges 450 to 496 MHz, 740 to 960 MHz, and 1700 to
1990 MHz.
FDT (downlink) generator specifications
FDT absolute output level accuracy with GMSK modulation on:
Specification
Ranges
< ± 2.10 dB
Single slot from –110 to –13 dBm
< ± 2.10 dB
1 multislot level between –110 and –13 dBm
< ± 2.50 dB
2 multislot levels ≤ 20 dB apart
Peak phase error
Frequency error
< ± 5 degrees
< ± 0.02 ppm plus timebase reference
Supplemental characteristics
Typical FDT absolute output level accuracy with GMSK
modulation on:
Specification
Ranges
< ± 1.40 dB
Single slot from –110 to –13 dBm
< ± 1.40 dB
< ± 1.70 dB
1 multislot level between –110 and –13 dBm
2 multislot levels ≤ 20 dB apart
FDT transmit power measurement specifications
Input signal conditions
Multislot signal
measurement capability
First slot has to be the highest burst, and
power level of first timeslot has to be within ± 3
dB of expected power
Measurement of up to seven timeslots
Minimum input level
For warranted performance, the signal at the
test set’s RF IN/OUT must have transmit power
> –14 dBm for first timeslot, and ≥ –25 dBm for
second to seventh timeslot
Measurement accuracy for FDT GMSK transmit
power at RF IN/OUT port between +20 and
+55 °C
Accuracy (dBm)
Ranges
< ± 0.85
700 to 800
810 to 960
< ± 0.87
450 to 496
1700 to 1990
Frequency capture range Signal must be within ± 70 kHz of test set’s
expected frequency for warranted performance
VSWR at RF IN/OUT
< 1.14 : 1 for 450 to 496 MHz and 700 to
960 MHz, < 1.2 : 1 for 1.7 to 1.99 GHz
Trigger sources
Fixed as protocol trigger (RF rising trigger for
the first step)
Trigger delay
± 2.31 ms
Concurrency capabilities Fast device tune measurements cannot be
made concurrently with other measurements
Supplemental characteristics
Typical measurement accuracy for FDT GMSK transmit power at
RF IN/OUT port between +20 and +55 °C:
Accuracy (dBm)
Frequency (MHz)
< ± 1.40
700 to 800
810 to 960
< ± 0.41
450 to 496
1700 to 1990
Typical measurement
repeatability
< ± 0.05 dB
Measurement resolution 0.01 dB
Typical burst modulation > 50 dB
on/off ratio (referenced
to lowest signal level)
Typical RMS phase error < 0.9 degree